We consider the problem of shotgun identification of patterns on groups,
which extends previous work on shotgun identification of DNA sequences
and labeled graphs. A shotgun identification problem on a group
is specified by two finite
subsets
and a finite alphabet
. In such problems, there
is a “global” pattern
,
and one would like to be able to identify this pattern (up
to translation) based only on observation of the “local”
-shaped subpatterns
of , called reads, centered
at the elements of
.
We consider an asymptotic regime in which the size of
tends to infinity
and the symbols of
are drawn in an i.i.d. fashion. Our first general result establishes sufficient conditions under which
the random pattern
is identifiable from its reads with probability tending to 1, and our second
general result establishes sufficient conditions under which the random pattern
is
nonidentifiable with probability tending to 1. Additionally, we illustrate our main
results by applying them to several families of examples.